Centrifugal machine.



A. J. ERICSSON, GENTRIFUGAL MACHINE. APPLICATION IILED MAB. 23, 1906.

.Patented Feb. 9, 1909.

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- Arron/vers..

A.' J. ERICSSON. v GBNTRII'UGALMAGHINE. APPLICATION FILED MAR. 23, 1906.

Patented Feb. 9, 1909.

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da MLLM ma Hz Arrow/Ey A. J. ERICSSON. CENTRIFUGAL MACHINE.' APPLwATioN FILED MAB. 2a, 190s 911,652. Pateted Few, 1909.

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/NVEIVVTR .Ag JILERICSSON. GENTRIFUGAL MACHINE. .Y APPLIGA-TION FILED MAR. 23, l906 ,M 9....; @n y lm n Ms.. M n# FB V .0 au wif, n e5 vr MM We J Lb n L w/rwfssfs: l

A. J. ERICSSON. GENTRIFUGAL MACHINE.

APPLIOATION FILED MAR. 2a, 190s.

To all whom 'it may concern.'

i' No. 911,652

UNirnD STATES PATENT? OFFICE.

ANDERS JOHAN ERICSSON, ,OF STOCKHOLM, SWEDEN, ASSIGNOR 110 AKTIEBOLAGET SEPARATOR, OF STOCKHOLM, SWEDEN. p

ENTMFUGAL MACHINE.

Specification of Application mea Marea as, isos.' serial-Ne. 307,572.

I Be it known that I, ANDERS JOHAN ErnessoN, a subject of the Kingof Sweden, residing at Stockholm, Sweden, have invented a new and useful Im rovement in Centrifugal Machines, of whic the following is a full,

clear, and exact description, reference being had to the accompanying drawings, which form a part of this specification.

My present invention relates to improve-V ments in centrifugal machines for separating 'solid matters from liquids and especially to separators of the class described in my United States Patent No. 773,489, and it more Vparticularly relates to arrangements for the automatic regulation of the flow of the liquid compound into the centrifugal machine. In centrifugal machines of this-kind'there: are two dierent shafts, one driving the centrifugal bowl at a -certain speed and the other driving a dmechanism inside the bowl at a different speed from that of the bowl. These l two .shaftsreceive their diderent speed .by

meansof a gearing device such as that deswibed in the patent of Birger Ljungstrom No. 845,103, dated February26, 1907. In that patent a device is shown, in which one shaft has the shape of a ybo t, in which cogl wheels roll with their naves on rolling surfixedI cog-wheel.

faces, said oog-wheels Igearing with a central,

The naves of the cog- .wheels are embraced by a cross-'piece or the like, to the center of which a cog-wheel is secured, gearing with other cog-wheela-rolling u on a cog-ring, the naves of said cogwhees being secured to 'a disk or the like. To the center ofsaid disk the other shaft i's secured. Brieiiy, between one, shaft and a fixed gearing-wheel a series ,of wheels -is placed,l which, by the rotation of the shaft, gets a rotary motion, which, by means of 4other wheels, isim arted to theother shaft. In this Way said -s aft is connected with a iixed wheel by means of a gearing transmission, and on that account the reaction pressure which acts upon said fixed wheel to rotate it is (apart from the frictional losses) directly proportionate to the work which is performed inside the bowl bythe mechanism for transporting the solids outy of the bowl. Said. pressure depends, in its turn, u on the quantity of solids which has 'strati ed valong the inner periphery of the bowl and which is to be transported outside the bowl. It .is evitween the quantity of solids stratifying along the inner periphery of the bowl, and therethe shaft or spindle of t e said fixed cog-wheel .p f

in' such a manner that it can turn in a journal box.I The turning motion of said lpart,` is,vl

however, Vcounteracted by a spring, Weight,

or in any other suitable Way. The motion of the turning part is transmitted -to a valve in the feed pipe orA to some other suitable regulating device, said motion-being transmitted in a mechanical way such as by means of a cord or cog-wheel-gearing, or in a pneumatic, hydraullc or electrical way. i

The invention is illustrtaed on the annexed drawings, in which Figure 1 shows a centrifugal machine in elevation, in which the motion of the turning part is v'transmitted to alever by means of a cord or a chain, said lever acting upon a valve or cock arranged inf'fthe` feed pipe. Fig. 2 is.a section on line 2-2 of Fig. 1. Fi 3 isga detail elevation of a modified va ve-operating device. 4shows a centrifugalfmachine in elevatlon in which 4the f machine in elevation, in which the turning part Whose vmotion is transmitted: to the regulating device extends through the cenf trifugal machine, said extension being at Lrange in the opening of the feed pipe. Fig.

7 is aA section on line 7,-7 of Fig. 6. Fig. 8 shows a centrifugal machine in elevation, in which the motion of the turning part is transmitted through the medium of an hydraulic arrangement. Fig. 9 shows a centrifugal machine in elevation, in which the motion ofthe turning part istransmitted through the medium of an electrical arrangnihnt shown in diagram. Figs. 10 and 11 .are respectively a vertical section and a horizontal section, of the gearing.

InFigs. 1 and 2 a is the frame of the centrifugal machine, b the centrifugal'bowl, a the owl casing, 'andino the driving shaft. Insidethe bowl there is a d-evicedfor transvice of this character is shown in` Letters dent, that in this way there is a relation bef.

Patentissued to me October 25th, 1904,:No

. "J0 its up er end connected with a cock, ar- N of the present invention.

773,489, it not being herein shown in detail, l ln iiig.

as its particular construction forins no part Said device d is driven from a shaft d, which is driven from the shaft c, at a speed dillerent from that of the shaft c, by means of a gearing device, inclosed in the box e, and a shaft or spindlef.

The gearing device is shown in detail in Figs. l0 and 11. The shaft or spindle j" is provided with a cog wheel 11 gearing into the cog Wheels 12, which are provided wi th shafts 13 pressing against the rolling surfaces of the inner walls of the rings 1d secured to-the box c. The shafts 13 are embraced bythe cross-piece 15 rotatable around the axes of the shafts c, d, f. 16 is a pinion secured to the cross-piece l5. 17 is a circular cog-ring secured to the inner wall ol the box e. 'lwo cog-wheels 1S are placed between, and inesh with, the pinion 1G and cog-ring 17. The cog-wheels 18 rotate on shafts 19 that project frein the disk 2O secured to the shaft d. This gearing device 1s constructed in accordance with the a}, plication of Ljungstroni hereinbefore referred to,k but no particular construction of gearing deviceis essential to the present invention. Freni the spindle f, which is turnably arranged on the frame, an arni y projects, said arm being connected by means ot' a cord 7i with a lever i, which is secured to the spindle 7c of the valve or iced regulating dcvice Z on the feed pipe Z and pivota-lly supported on the valve by means of a link lhe spiral s ring m acts to press the spindle 7c to its higliest position. lhedeviee acts in the following manner.

. Power is applied to the machine by means of a belt enga-ging the shaft c or box.

lf a considerable quantity of solidniatters should stratify along the inner periphery of; the bowl, on account of too great a quantity of liquid. compound being fed into the bowl, br on account of the liquid compound being too rich in solid matters, the sh ,if td will be loaded more than before. v As said shall is connected with the shaftf, this will lle act vl upon by the increased reaction pressure as to turn a little. This turning inotionis then-transmitted by means of the cord t to the lever i, the front end of which will be pressed downwards, so that the cocl: Z 'is more or less throttled, Thereby the l low of the liquid compound to the centrifugal 'machine will be restrained, `and then, the

quantityl of solids on the inner periphery of the. bowl Will also soon be reduced. As soon as the Work of the transporting device inside the bowl is reduced, the load on the shaft d Will also be reduced,l uf'hereby the reaction ressure on the spindlef decreases, so that t ie arm. g on account of the tension of the sprin r m is turned `to its normal position, Wherezby the cock Z is fully opened again.

3 a nuialiiieation is sl1ou'n,'in which the lever i is loaded by a weight a instead of a spring, said. weight acting 'upon the lever to hold. it in the position shown in the `iigurc, whereby the valve is fully opened. hen the spindle f is loaded more than norinally,

the weight a and the lever ill take thepositions shown in dotted lines, whereby the cock is throttled.

.ln Figs. Lt and 5 another einbodinant of lny invention is illustrated. 'ihe box is oinitted and the spindle/is integral with the shaft d. y n ana of bevel gears 0"' and o4,

shaft o3, and bevel gears o1 and o, the slutftf is connected with thev spindle o, which, by lneans of ti spiral spring p, .is normally held in a certain position. 'rbc spindle o is screw-threaded at its upper end, and this end of the spindle 'lits into a threaded shell secured to the tube r. By lneans of allexible tube s or in any other suitable way the said. tube r is lioined with the feed tube for the liquid compound. The tube r opens on the lloat u. 'l'he arrangement acts in the following way: li the loading on the shaft d be increased on account of the incrersed resistance. inside the bowl, the lorsionof the spring p will be overcome and b v ineans of the cog-wheel gearing the spindle o is turned. more or less in the direction indicated by the arrow. yThe shell g will be louf'ered and then also the tube r, whereby the opening thereof is lowered against the lloat u and beconie more or less constricted. The llow of the liquid compound into the centrifugal machine will in this way be restrained and then the quantity of the separated solid matters reduced. YWhen the 'work oli'the inner mechanism is reduced, the load of the sha-ft d is also reduced and then the spiral spring p turns the spindle o with the to their normalpositions. 'f'he opening of lthe tube r is then again raised from the float and. the llow of the liquid compound to the machine increased. lt is evident that the spiral p need not be arranged so as to act by 'ineens of its torsion, nor need it be arranged to-act upon the spindle 0, but can be otherv. e arranged or conneetwl to produce the saine result. y

ln Figs. 6 and 7 another'niodihed forni is shown. is in -Figs. 1 and 2, the shaft d is driven from a gearing device in a gearing-box c and connected with the spindle f, which is provided with a projecting arni g. in this 'embodiment said. ar'in is connected with-a 'fixed part on' the traine by means of a spiral spring u. the spindlefpasses through the whole inachim, requiringithe shaft d to be .liollow, and at its upper end has an enlarged Inonth, which surrounds the opening of the feed pipe Vhenfthe inner transporting mechanism is overloaded, the shaft d' will also be so. The reaction pressure on the spindle will then be increased and the tenspindlef ils ' in character.

' is a pipe'connecting the two pistons. When the normal. forms acontact'arml adapted 1n its movesion of the spring u will be overcome,

whereby the spindle f will turn in the direction indicated by the arrow,`.thereby closing more or less,4 the opening of the feed pipe As soon as the quantity of the separated solid matters becomes normal, the reaction pressure will be reduced and the spindle fwill' suitable way, whereby the capacity of the centrifugalmachine may be varied.

Y In Fig. 8 the machine is the same as in Fig. 1 with the exception of the regulating device itself which -is pneumatic or hydraulic Connected to arm'g is the Connected to 15 iston 11 of acylinder 12. ever e is the piston 13 of a cylinder 14.

the shaft f is acted uponv by the increasedI reaction pressure to turn a little as before described, the arm g turns clockwise, and the; piston 1,1- is moved and acts upon the liqlpid or die inthe cylinder 12, pipe `15 and I x cy 'nder 14A to force` the piston 13 down- Wardly, thereby through lever t, .throttling the lvalve l.

In Fig. 9, I have shown the feed tube t connected, by means of a flexible tube s, with the tube r opening on the float u, precisely as in Fig. 4. The lower part of the machine is not shown, but it may be assumed to correspond to Fig. 1, in which the arm gis turned when the reaction pressure increases beyond The arm g in this modification ment to move over the contacts 20 of an electricalresistance 21. 22 is a solenoid and 24 a source of current supply, 'such as a dynamo. The first contact of the resistance vis connected by conductor 25 with one pole of the dynamo, the other pole' of the dynamo being connected by conductor 26 with one end of the solenoid 22. The other endof the solenoid is connected by conductor '27 with the pivoted end of army. The core 23 of the solenoid is connected to the pipe r. When the lever g is turned clockwise as before described, the arm g moves to cut in resistance, thereby weal'rening the solenoid 22 and permitting the pipe r to drop, thus decreasing the supply of "liquid to-th'e separator, aswill be more fully understood by reference to the machine of Fig. 4.

It is evident tli'at the arrangements for the automatic regulation of the flow of the liquid compound may be used in centrifugal drying what claim and desire to .protect by Letters Patent is separators and will work in the same manner I liquids from solid mattefs, the combination with the bowl and a-device for transporting solids outside' the bowl, of a ygearing device interposed between the bowl and the transporting device by "which the bowl and transporting device are driven at different speeds,

a shaft engaging the gearing devicel andl adapted to turn on account .of the reaction pressure from the transporting device, a device for regulating the feed of the liquid compound to the bowl, and means connecting the shaft and the feed regulating device by which the latter is operated.

2. Ina centrifugal machine for se arating li uids from solid` matters, the com ination with the bowl and a device for transporting solids outside the bowl, of a gearing deviceinterposed between the bowl and the transporting device by which the bowl and transporting device are driven at different speeds, a shaft engaging the gearin device and adapted to turn onaccount o the reaction` pressure from the transporting device, and a tension device tendingto restrain said shaft from `turning but permitting it to turn to an extent` proportlonate to.' said reaction pressure.

3. In la machine for separating li uids 'from'solidmattera the combination wit the bowl and a device for transporting the solids outsidethe bowl, of a shaft connected with the solids transporting device and adapted to turn 'on'` account of the reactionvpressure therefrom, a feed pipe for conducting the liquid compound to the bowl, a device for regulating the feed-from the pipe, and means connecting the shaft and the feed regulating device to cause the one to be operated by the other, whereby the feed of the liquid compound to the bowl is caused to vary with the variation of solids in the bowl, substantially as described. l

4. In a machine for separating Yli uids from solid matters, the combination wit' the bowl and its driving shaft, of a device for transporting the solids outside the bowl and a driving shaft therefor, a third shaft, a gearing device engaging the third shaft and interposed between the two driving shafts to proportion their speeds, a feed pipe, for conducting the liquid compound to the bowl .a

device for regulating the feed from the ipe, and means connecting the third shaft an the regulating device whereby one is operated by the other to'cause the feed to vary with the turning of the shaft. v

5. In a machine for separating li uids from solid matters, the combination wit the bowl and its driving shaft, of a device for transporting the solids outside the bowl and a driving shaft therefor, a third shaft, a gearing device engaging the third shaft and interposed between the two driving shafts to proportion their speeds, a feed pipe for con- 1. l In a centrifugal machine for separating i ducting the liquid compound to the bowl, a 

